- Definitions|1
- Thesaurus|142
- Abbreviations|0
| unfortunately(adverb, sadly, alas, unluckily, disastrously) | |
| remorsefully(adverb, alas, penitently, repentantly) | |
| ruefully(adverb, remorsefully, repentantly) | |
| contritely(adverb, remorsefully, penitently, repentantly) | |
| penitently(adverb, remorsefully, penitently, repentantly) | |
| sorrowfully(adverb, unhappily, repentantly) | |
| mournfully | |
| apologetically(adverb, remorsefully, penitently, repentantly) | |
| sadly(adverb, alas) | |
| lamentably | |
| regrettably(adverb, alas) | |
| repentantly(adverb, remorsefully) | |
| unhappily | |
| gloomily | |
| sorrily | |
| ashamedly | |
| atoningly(adverb, penitently) | |
| dolefully | |
| drably | |
| grievingly |
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| APA | Smart Define. (2015). regretfully thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/regretfully/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "regretfully thesaurus" https://smartdefine.org/regretfully/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, regretfully thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/regretfully/thesaurus/synonyms>. |
| MLA | Smart Define. "regretfully thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/regretfully/thesaurus/synonyms> |